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Read scheduled times

scheduleList
Read-onlyIdempotent

Returns compact paginated calendar entries in an inclusive UTC date window, ordered by scheduled time. Entries contain campaign identity, status and timing without content or media. Reading available times does not reserve them.

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "endAt": "<endAt>",
      "startAt": "<startAt>"
    },
    "name": "scheduleList"
  }
}

Input Schema

NameRequiredDescriptionDefault
endAtYesInclusive UTC epoch milliseconds, at most 366 days after startAt.
limitNo
cursorNo
startAtYesInclusive UTC epoch milliseconds.

Output Schema

NameRequiredDescriptionDefault

No arguments

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed2 schema fields changed
    • changedInput schema / properties / endAt / minimum
      Previous value: --9007199254740991New value: +0
    • changedInput schema / properties / startAt / minimum
      Previous value: --9007199254740991New value: +0
  2. Changed1 schema field changed
    • removedOutput schema / $defs / __schema0 / properties / whatsAppStatus
      Removed value: -{
      -  "enum": [
      -    "queued",
      -    "sending",
      -    "accepted",
      -    "partially_accepted",
      -    "failed",
      -    "needs_review",
      -    "canceled",
      -    "suppressed"
      -  ],
      -  "type": "string"
      -}
  3. Changed1 schema field changed
    • changedOutput schema / oneOf
      Previous value: -[
      -  {
      -    "additionalProperties": false,
      -    "properties": {
      -      "ok": {
      -        "const": true,
      -        "type": "boolean"
      -      },
      -      "output": {
      -        "additionalProperties": false,
      -        "properties": {
      -          "cursor": {
      -            "anyOf": [
      -              {
      -                "maxLength": 4096,
      -                "type": "string"
      -              },
      -              {
      -                "type": "null"
      -              }
      -            ]
      -          },
      -          "done": {
      -            "type": "boolean"
      -          },
      -          "items": {
      -            "items": {
      -              "$ref": "#/$defs/__schema0"
      -            },
      -            "maxItems": 20,
      -            "type": "array"
      -          }
      -        },
      -        "required": [
      -          "cursor",
      -          "done",
      -          "items"
      -        ],
      -        "type": "object"
      -      },
      -      "toolName": {
      -        "const": "scheduleList",
      -        "type": "string"
      -      }
      -    },
      -    "required": [
      -      "ok",
      -      "output",
      -      "toolName"
      -    ],
      -    "type": "object"
      -  },
      -  {
      -    "additionalProperties": false,
      -    "properties": {
      -      "error": {
      -        "additionalProperties": false,
      -        "properties": {
      -          "code": {
      -            "enum": [
      -              "INVALID_INPUT",
      -              "FORBIDDEN",
      -              "NOT_FOUND",
      -              "CONFLICT",
      -              "FEATURE_DISABLED",
      -              "CONFIRMATION_REQUIRED",
      -              "CONFIRMATION_INVALID",
      -              "UPSTREAM_FAILED",
      -              "NEEDS_REVIEW",
      -              "INTERNAL"
      -            ],
      -            "type": "string"
      -          },
      -          "message": {
      -            "maxLength": 2048,
      -            "minLength": 1,
      -            "type": "string"
      -          },
      -          "retryable": {
      -            "type": "boolean"
      -          }
      -        },
      -        "required": [
      -          "code",
      -          "message",
      -          "retryable"
      -        ],
      -        "type": "object"
      -      },
      -      "ok": {
      -        "const": false,
      -        "type": "boolean"
      -      },
      -      "toolName": {
      -        "const": "scheduleList",
      -        "type": "string"
      -      }
      -    },
      -    "required": [
      -      "error",
      -      "ok",
      -      "toolName"
      -    ],
      -    "type": "object"
      -  }
      -]New value: +[
      +  {
      +    "additionalProperties": false,
      +    "properties": {
      +      "ok": {
      +        "const": true,
      +        "type": "boolean"
      +      },
      +      "output": {
      +        "additionalProperties": false,
      +        "properties": {
      +          "cursor": {
      +            "anyOf": [
      +              {
      +                "maxLength": 4096,
      +                "type": "string"
      +              },
      +              {
      +                "type": "null"
      +              }
      +            ]
      +          },
      +          "done": {
      +            "type": "boolean"
      +          },
      +          "items": {
      +            "items": {
      +              "$ref": "#/$defs/__schema0"
      +            },
      +            "maxItems": 20,
      +            "type": "array"
      +          }
      +        },
      +        "required": [
      +          "cursor",
      +          "done",
      +          "items"
      +        ],
      +        "type": "object"
      +      },
      +      "toolName": {
      +        "const": "scheduleList",
      +        "type": "string"
      +      }
      +    },
      +    "required": [
      +      "ok",
      +      "output",
      +      "toolName"
      +    ],
      +    "type": "object"
      +  },
      +  {
      +    "additionalProperties": false,
      +    "properties": {
      +      "error": {
      +        "additionalProperties": false,
      +        "properties": {
      +          "code": {
      +            "enum": [
      +              "AI_SCHEDULING_LIMIT_REACHED",
      +              "AI_SCHEDULING_UNAVAILABLE",
      +              "INVALID_INPUT",
      +              "FORBIDDEN",
      +              "NOT_FOUND",
      +              "CONFLICT",
      +              "FEATURE_DISABLED",
      +              "CONFIRMATION_REQUIRED",
      +              "CONFIRMATION_INVALID",
      +              "UPSTREAM_FAILED",
      +              "NEEDS_REVIEW",
      +              "INTERNAL"
      +            ],
      +            "type": "string"
      +          },
      +          "message": {
      +            "maxLength": 2048,
      +            "minLength": 1,
      +            "type": "string"
      +          },
      +          "retryable": {
      +            "type": "boolean"
      +          }
      +        },
      +        "required": [
      +          "code",
      +          "message",
      +          "retryable"
      +        ],
      +        "type": "object"
      +      },
      +      "ok": {
      +        "const": false,
      +        "type": "boolean"
      +      },
      +      "toolName": {
      +        "const": "scheduleList",
      +        "type": "string"
      +      }
      +    },
      +    "required": [
      +      "error",
      +      "ok",
      +      "toolName"
      +    ],
      +    "type": "object"
      +  }
      +]
  4. First observed

TDQS

A3.7/5.0
Behavior4/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already declare readOnly, idempotent, non-destructive, and closed-world, so the bar is lower. The description still adds real behavioral context: entries are compact/truncated (no content or media), results are ordered by scheduled time, and reading does not reserve a slot — a side-effect guarantee beyond the annotation set.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Three short sentences, front-loaded with the core action and scope, then the payload shape, then the reservation caveat. Every sentence carries information; nothing is padded, though the layout could be tightened further.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

An output schema exists, so return values need not be explained, and the description's note on entry contents and ordering still helps. The remaining gap is the pagination/limit behavior and the maximum window constraint, which are handled only by the schema.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

With 50% schema description coverage, startAt/endAt are documented in the schema while limit and cursor are not. The description partially compensates by signaling pagination and an inclusive window, but it adds no detail on page size, cursor semantics, or the 366-day window constraint that governs a valid call.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description gives a concrete verb and resource ("Returns compact paginated calendar entries") plus scope (inclusive UTC date window, ordered by scheduled time), and clarifies what each entry contains and omits ("campaign identity, status and timing without content or media"). It does not name or differentiate from the batch siblings (campaignScheduleBatchExecute/Review), so an agent must infer that this is the read-only listing path.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines3/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Usage context is implied rather than stated: it is clearly for reading scheduled times within a window, and "Reading available times does not reserve them" hints at a read-only peek before acting. There is no explicit when-to-use/when-not guidance pointing to a sibling for executing or reviewing batches.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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